ENTOMOLOGY 925 
This beautiful insect is apparently restricted to the West African portion of 
the Congo Basin and the neighboring Portuguese territory of Cabinda. I am 
inclined to doubt the provenance of the single specimen labelled ‘‘ Elisabethville”’ 
at the Congo Museum, since no other record of the species is known from Upper 
Katanga. 
Surcouf (1911, Rev. Zool. Afric., I, p. 29) states that he saw a female of 
T’. canescens Surcouf (1909, Bull. Mus. Hist. Nat. Paris, XV, p. 353; 9; Beira 
in the Chari District, French Equatorial Africa) from the Belgian Congo, but 
gives no locality. This Congo record appears very doubtful. Moreover, 7 
canescens is probably not a valid species, but only a small variation of 7’. canus. 
Tabanus billingtoni Newstead 
Tabanus billingtoni Newstead, 1907, Ann. Trop. Med. Paras., I, p. 46, Pl. III, fig. 1, and Pl. IV, 
figs. 10-12 ( ¢ #; Tshumbiri, Bolengi, and Matadi, Belgian Congo). Austen, 1909, ‘Illustr. 
African Blood-Suck. Flies,’ p. 96, Pl. VII, fig. 5 (¢). 
Tabanus splendidissimus “Ricardo”? Surcouf, 1907, Bull. Mus. Hist. Nat. Paris, XIII, p. 212 
( 2; without description). 
Betatan Conao. — Between Bolobo and Lukolela, July 1909; Basoko, 
July 24, 1909; Stanleyville, females and males, taken as prey by Bembia be- 
quaertt Arnold var. dira Arnold, April 1915; Niapu, January 1914; Akenge, 
September 1913 (H. Lang and J. P. Chapin). Lubutu, January 1915; Lisala, 
December 28, 1926. Dungu (DeGreef). Lebo (J. Rodhain). Kondué (Leon- 
ard). Hemptinne-St.-Benoit (Callewaert). Eala (Mayné). Dima (Daniel). 
Malela, 187 kilom. south of Kindu (Burgeon). Luebo (D. W. Snyder. — 
U.S.N.M.). 
A typically West African horse-fly, known from Dahomey to Angola and 
the Upper Congo. 
Tabanus marmorosus Surcouf 
Tabanus marmorosus Surcouf, 1909, Bull. Mus. Hist. Nat. Paris, XV, p. 351 (9; West Africa); 
1909, ‘Et. Monogr. Taban. Afrique,’ pp. 29 and 38, fig. 9 (on p. 30), Pl. I, fig. 7 (¢). 
Tabanus marmoratus ‘‘Surcouf, in litteris’’ Austen, 1909, ‘Illustr. African Blood-Suck. Flies,’ 
p. 95, Pl. VII, fig. 52 (¢). Not Dichelacera marmorata Bigot, 1892, which according to Surcouf 
is a T'abanus. 
LipERiA. — Banga, one female, October 1926. In life the eyes were uni- 
formly black, with a slight greenish copper tinge. 
This specimen agrees best with Austen’s colored figure of the species, except 
that the ground-color of the entire body is black, rendered more or less slate- 
gray on head and thorax by a pale pruinosity and pubescence; but Austen 
remarks that his drawing was a good deal too red as regards the anterior portion 
of the body. In the Liberian specimen the basal half of the scutellum is covered 
with black pile. The first and second abdominal tergites are mostly covered 
with black pile; there is a median spot of white hair and pruinosity on the 
hind margin, very small on the first, large and triangular on the second; in 
addition there are larger white spots in the hind corners, not connected with 
the median spots. The third to fifth tergites each bear a more or less triangular, 
median, white spot; that of the fourth tergite much larger than the others 
